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https://github.com/featurebasedb/featurebase.git
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bc450a91ea
* Thread context through sql3 DATABASE operations * Get rid of *most* of the context.Background() references
97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
// Copyright 2022 Molecula Corp. All rights reserved.
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package planner
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import (
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"context"
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"fmt"
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"github.com/featurebasedb/featurebase/v3/sql3"
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"github.com/featurebasedb/featurebase/v3/sql3/planner/types"
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)
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// PlanOpAlterView implements the ALTER VIEW operator
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type PlanOpAlterView struct {
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planner *ExecutionPlanner
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view *viewSystemObject
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warnings []string
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}
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func NewPlanOpAlterView(planner *ExecutionPlanner, view *viewSystemObject) *PlanOpAlterView {
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return &PlanOpAlterView{
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planner: planner,
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view: view,
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warnings: make([]string, 0),
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}
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}
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func (p *PlanOpAlterView) Schema() types.Schema {
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return types.Schema{}
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}
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func (p *PlanOpAlterView) Iterator(ctx context.Context, row types.Row) (types.RowIterator, error) {
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return newAlterViewIter(p.planner, p.view), nil
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}
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func (p *PlanOpAlterView) Children() []types.PlanOperator {
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return []types.PlanOperator{}
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}
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func (p *PlanOpAlterView) WithChildren(children ...types.PlanOperator) (types.PlanOperator, error) {
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if len(children) != 0 {
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return nil, sql3.NewErrInternalf("unexpected number of children '%d'", len(children))
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}
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return NewPlanOpAlterView(p.planner, p.view), nil
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}
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func (p *PlanOpAlterView) Plan() map[string]interface{} {
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result := make(map[string]interface{})
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result["_op"] = fmt.Sprintf("%T", p)
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result["_schema"] = p.Schema().Plan()
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result["model"] = p.view.name
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return result
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}
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func (p *PlanOpAlterView) String() string {
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return ""
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}
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func (p *PlanOpAlterView) AddWarning(warning string) {
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p.warnings = append(p.warnings, warning)
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}
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func (p *PlanOpAlterView) Warnings() []string {
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var w []string
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w = append(w, p.warnings...)
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return w
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}
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type alterViewIter struct {
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planner *ExecutionPlanner
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view *viewSystemObject
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}
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func newAlterViewIter(planner *ExecutionPlanner, view *viewSystemObject) *alterViewIter {
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return &alterViewIter{
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planner: planner,
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view: view,
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}
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}
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func (i *alterViewIter) Next(ctx context.Context) (types.Row, error) {
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// now check in the views table to see if it exists
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v, err := i.planner.getViewByName(ctx, i.view.name)
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if err != nil {
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return nil, err
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}
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if v == nil {
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return nil, sql3.NewErrViewNotFound(0, 0, i.view.name)
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}
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// now store the view into fb_views
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err = i.planner.updateView(ctx, i.view)
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if err != nil {
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return nil, err
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}
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return nil, types.ErrNoMoreRows
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}
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